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Finding the Fourth Proportional to 60,578.80, 90,868.20 and 56,690.80

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Solution

The fourth proportional to 60,578.80, 90,868.20 and 56,690.80 is: 85,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,578.80 : 90,868.20 = 56,690.80 : x
  2. Step 2: Convert to fraction form
    60,578.80/90,868.20 = 56,690.80/x
  3. Step 3: Cross multiply
    60,578.80x = 90,868.20 × 56,690.80
  4. Step 4: Simplify right side
    60,578.80x = 5,151,390,952.56
  5. Step 5: Solve for x
    x = 5,151,390,952.56/60,578.80
  6. Step 6: Final answer
    x = 85,036.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.